Jonkvrouw Karin Hildur "Kajsa" Ollongren (born 28 May 1967) is a Dutch politician of the Democrats 66 (D66) party. She has been the acting Mayor of Amsterdam since 18 September 2017.She has been an Alderperson and Deputy mayor in Amsterdam since 18 June 2014. Ollongren served as the Secretary-General of the Ministry of General Affairs from 2011 until 2014.Ollongren is the daughter of astronomer Alexander Ollongren.On 18 September 2017 it was announced by Eberhard van der Laan in an open letter to Amsterdam citizens that Kajsa Ollongren would take up his office as acting Mayor of Amsterdam - with immediate effect - with the resignation of Van der Laan due to ill health. Wikipedia
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